1. Department of Gastroenterology, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
2. Digestive Diseases Research Center University of Ulsan College of Medicine Seoul South Korea
3. Department of Gastroenterology, Center for Health Promotion, Seoul National University Hospital Seoul National University College of Medicine Seoul South Korea
4. Asan Institute for Life Sciences Asan Medical Center Seoul South Korea
5. Department of Pathology, Incheon St. Mary's Hospital, College of Medicine The Catholic University of Korea Incheon South Korea
6. Department of Colon and Rectal Surgery, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
7. Department of Pathology, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
8. Health Screening and Promotion Center, Asan Medical Center Seoul South Korea
9. Department of Convergence Medicine, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea